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Redis – I need to create a docker-compose for flask and several other libraries?

I need to create a docker-compose file for flask based API back end application. But this application is based on several other libraries following. All need to run on docker containers only. Can you suggest how will be the docker-compose file and related if any?

  • psycopg2
  • aniso8601==8.0.0
  • argon2-cffi==19.2.0
  • certifi==2019.11.28
  • cffi==1.14.0
  • chardet==3.0.4
  • click==7.1.1
  • cryptography==2.9
  • defusedxml==0.6.0
  • Flask==1.1.2
  • Flask-Caching==1.8.0
  • Flask-JWT-Extended==3.24.1
  • Flask-Login==0.4.1
  • Flask-OAuthlib==0.9.5
  • Flask-OpenID==1.2.5
  • Flask-RESTful==0.3.8
  • Flask-SQLAlchemy==2.4.1
  • flask-swagger==0.2.13
  • Flask-WTF==0.14.3
  • graphviz==0.14
  • gunicorn==19.10.0
  • idna==2.9
  • itsdangerous==0.24
  • Jinja2==2.10.1
  • kazoo==2.5.0
  • Mako==1.1.2
  • MarkupSafe==1.1.1
  • oauthlib==2.1.0
  • passlib==1.7.2
  • pika==1.1.0
  • pycparser==2.20
  • PyJWT==1.7.1
  • pykafka==2.8.0
  • pymemcache==3.1.1
  • pymongo==3.5.1
  • pypyodbc==1.3.5.2
  • python-dateutil==2.8.1
  • python-editor==1.0.4
  • python3-openid==3.1.0
  • pytz==2019.3
  • PyYAML==5.3.1
  • redis==3.5.0
  • requests==2.23.0
  • requests-oauthlib==0.8.0
  • six==1.14.0
  • SQLAlchemy==1.3.15
  • SQLAlchemy-Utils==0.36.3
  • tabulate==0.8.7
  • urllib3==1.25.8
  • Werkzeug==0.15.3
  • WTForms==2.2.1
  • python-ldap
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2

Answers


  1. 0

    My example is with Django but you can use for your flask container too

    You can create a Dockerfile, for example if your flask container run within app folder of the container:

    docker-compose.yml:

    version: '3'

services:

web:
    build: .
    volumes:
      - .:/app
    ports:
      - "${WEB_HOST}:${WEB_HOST}"
    depends_on:
      - mysql # if you have database in another container
    environment:
      - PYTHONUNBUFFERED=1
    command: python manage.py runserver 0.0.0.0:${WEB_HOST} #or what command you use to start your flask server

    You need a requirements.txt file to list all your packages

    And write a Dockerfile to install all package into app container folder when run docker-compose up:

    FROM python:3.7.5-buster
ADD requirements.txt /app/requirements.txt
ADD . /app/
WORKDIR /app/
RUN pip install -r requirements.txt
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  2. 0

    The best way here is to go through this file – https://docs.docker.com/compose/gettingstarted/. But if you want to try it fast, then here is some short instructions:

    1. create a requirements.txt file with all dependencies (list of libs with versions)
    2. create a Dockerfile
    FROM python:3.7-alpine

WORKDIR /code

ENV FLASK_APP app.py
ENV FLASK_RUN_HOST 0.0.0.0

RUN apk add --no-cache gcc musl-dev linux-headers
COPY requirements.txt requirements.txt

RUN pip install -r requirements.txt
COPY . .

CMD ["flask", "run"]
    1. create docker-compose.yml file:
    version: '3'
services:
  web:
    build: .
    ports:
      - "5000:5000"

    Of course in reality it will be more complex (you will have Data Base, maybe Redis, etc – for big project this tool can help you https://github.com/cookiecutter-flask/cookiecutter-flask)

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